3Com VCX V7111 Fast Track Installation Guide20Cables and Cabling ProcedureCable your VCX V7111 according to each section of Table 6 on page 20.Table 6 Cables and Cabling ProcedureCable Cabling ProcedureRJ-45 EthernetcableWhen initializing (connecting the VCX V7111 to the LAN for the first time) use astandard Ethernet cable to connect the network interface on your computer to a porton a network hub / switch. Use a second standard Ethernet cable to connect the VCXV7111 to another port on the same network hub / switch.For normal use, connect the 10/100 Base-T RJ-45 Ethernet port directly to the IPnetwork, using a standard Ethernet cable. For connector’s pinout see Figure 8 onpage 21.Connect the RJ-11 connectors on the rear panel ofthe 2, 4, or 8FXS to fax machine, modem, or phones(see Figure 9 on page 21).Connect the RJ-11 connectors on the 4 or 8FXO rearpanel to telephone exchange analog lines or PBXextensions (Figure 9 on page 21).Ensure that FXS/FXO areconnected to the correctdevices, otherwise damagecan occur.RJ-11 two-wiretelephone cords24FXS ports are usually distributed using an MDF Adaptor Block (special orderoption). See Figure 11 on page 22 for details.50-pin Telco cable(24FXS devicesonly).An Octopuscable is notincluded withthe 24FXSpackage.1 Wire the 50-pin Telco connectors according to the pinout in Figure 10 on page21, and Table 7 on page 22.2 Attach each pair of wires from a 25-pair Octopus cable to its correspondingsocket on the MDF Adaptor Block’s rear.3 Connect the wire-pairs at the other end of the cable to a male 50-pin Telcoconnector.4 Insert and fasten this connector to the female 50-pin Telco connector on the24FXS rear panel (labeled Analog Lines 1-24).5 Connect the telephone lines from the Adaptor Block to a fax machine, modem, ortelephones by inserting each RJ-11 connector on the 2-wire line cords of thePOTS phones into the RJ-11 sockets on the front of an MDF Adaptor Block asshown in Figure 11 on page 22.RS-232 serial cable Connect the RS-232 port to your PC’s RS-232 port with a straight serial cable. Usingthe RS-232 port is optional.Protective earthingstrapConnect an earthed strap to the chassis protective earthing screw and fasten itsecurely according to the safety standards.AC Power cable Connect the VCX V7111 100-250V~ 50-60 Hz power socket to the mains.DC Power cable(24FXS devicesonly)See Figure 12 on page 23. Insert two 18 AWG wires into the supplied DC terminalblock and fasten the two screws located directly above each wire. Insert the DCterminal block into the DC inlet on the 24FXS rear panel and fasten it with the twoadaptor-to-panel screws. Connect the other end of the cable to a 48 VDC powersupply.